Trilobite and Sea Scorpion Fossil TrackwaysThis curious wee slab is absolutely alive with movement from the Mississippian seas, laid down some 359.2 to 318.1 million years ago when strange arthropods were bustling about the seafloor like tiny armoured Roombas on a mission. What makes this block especially tasty to the fossil-loving eye is that it preserves both a lovely Cruziana trilobite
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